Projection system and projection screen supporting device

Abstract

This disclosure relates to the field of projection display technologies, and discloses a projection system and a projection screen supporting device, the projection system including a projection screen and a projection device, and further a projection screen supporting device, the projection screen being installed on a bracket body of the projection screen supporting device, where the projection screen supporting device includes the bracket body, a supporting assembly, and a projection screen hanging assembly; the bracket body includes a first standing pole and a second standing pole, both of which are arranged substantially parallel to each other; the supporting assembly is fixed on the bracket body to support the bracket body; and the projection screen hanging assembly is arranged on the bracket body, at an adjustable position in the direction in which the first standing pole and the second standing pole extend, to hang a projection screen on the bracket body.

The invention claimed is: 
     
       1. A projection system comprising a projection screen, a projection device and a projection screen supporting device, the projection screen supporting device including a bracket body, a supporting assembly and a projection screen hanging assembly, the projection screen installed on the bracket body of the projection screen supporting device,
 wherein the bracket body of the projection screen supporting device comprises a first standing pole and a second standing pole, both of which are arranged substantially parallel to each other, 
 wherein the supporting assembly of the projection screen supporting device is fixed on the bracket body to support the bracket body, 
 wherein the projection screen hanging assembly of the projection screen supporting device is arranged on the bracket body, at an adjustable position in the direction in which the first standing pole and the second standing pole extend, to hang a projection screen on the bracket body, 
 wherein the projection screen hanging assembly comprises a first hanging piece, a second hanging piece, a third hanging piece and a fourth hanging piece, 
 wherein the first hanging piece and the second hanging piece of the projection screen hanging assembly are slidably installed on the first standing pole in the direction in which the first standing pole extends, and the first hanging piece is located between the second hanging piece and a top end of the first standing pole, 
 wherein the third hanging piece and the fourth hanging piece of the projection screen hanging assembly are slidably installed on the second standing pole in the direction in which the second standing pole extends, and the third hanging piece is located between the fourth hanging piece and a top end of the second standing pole, 
 wherein a guide groove, extending in the direction in which the first standing pole extends, is arranged on the first standing pole, and a guide groove, extending in the direction in which the second standing pole extends, is arranged on the second standing pole, 
 wherein the first hanging piece, the second hanging piece, the third hanging piece, and the fourth hanging piece of the projection screen hanging assembly each comprises a slider and a connection piece removably installed on the slider, 
 wherein in the first hanging piece and the second hanging piece, the slider is slidably engaged with the guide groove of the first standing pole, and the slider is locked on the first standing pole when the connection piece is installed on the slide, and 
 wherein in the third hanging piece and the fourth hanging piece, the slider is slidably engaged with the guide groove of the second standing pole, and the slider is locked on the second standing pole when the connection piece is installed on the slider. 
 
     
     
       2. The projection system according to  claim 1 , wherein the connection pieces of the first hanging piece and the third hanging piece are hanging wheels formed on circumferential faces thereof with annular hanging grooves, wherein axes of the annular hanging grooves coincide with axes of the hanging wheels, wherein the annular hanging grooves are configured to hang hitching members, arranged on the backside of the projection screen corresponding to the first hanging piece and the third hanging piece, and wherein the connection pieces of the second hanging piece and the fourth hanging piece are configured to be electrically connected with hitching sections, arranged on the backside of the projection screen corresponding to the second hanging piece and the fourth hanging piece. 
     
     
       3. The projection system according to  claim 1 , wherein elastic pieces are arranged on the sliders and frictionally engaged with groove walls of the guide grooves to overcome the gravities of the sliders. 
     
     
       4. The projection system according to  claim 1 , further comprising a first traversing pole and a second traversing pole opposite to each other, both of which are connected with the first standing pole and the second standing pole. 
     
     
       5. The projection system according to  claim 4 , further comprising a third traversing pole between the first traversing pole and the second traversing pole, the third traversing pole having one end connected with the first standing pole and another end connected with the second standing pole. 
     
     
       6. The projection system according to  claim 5 , wherein said one end of the third traversing pole is slidably installed on the first standing pole in the direction in which the first standing pole extends, and said other end of the third traversing pole is slidably installed on the second standing pole in the direction in which the second standing pole extends. 
     
     
       7. The projection system according to  claim 5 , wherein at least one end of the third traversing pole is arranged with an elongated pole extending beyond a gap between the first standing pole and the second standing pole to hang a peripheral device of the projection screen. 
     
     
       8. The projection system according to  claim 4 , wherein the supporting assembly comprises a first supporting pole and a second supporting pole, both of which are substantially parallel to each other, wherein the first supporting pole is fixed on a bottom end of the first standing pole, and substantially perpendicular to the first standing pole and the second traversing pole, wherein the second supporting pole is fixed on a bottom end of the second standing pole, wherein triangular fixing pieces are arranged between the first supporting pole and the first standing pole, and between the first supporting pole and the second traversing pole, and wherein triangular fixing pieces are arranged between the second supporting pole and the second standing pole, and between the second supporting pole and the second traversing pole. 
     
     
       9. A projection screen supporting device comprising a bracket body, a supporting assembly and a projection screen hanging assembly,
 wherein the bracket body comprises a first standing pole and a second standing pole, both of which are arranged substantially parallel to each other, 
 wherein the supporting assembly is fixed on the bracket body to support the bracket body, 
 wherein the projection screen hanging assembly is arranged on the bracket body, at an adjustable position in the direction in which the first standing pole and the second standing pole extend, to hang a projection screen on the bracket body, 
 wherein the projection screen hanging assembly comprises a first hanging piece, a second hanging piece, a third hanging piece and a fourth hanging piece, 
 wherein the first hanging piece and the second hanging piece of the projection screen hanging assembly are slidably installed on the first standing pole in the direction in which the first standing pole extends, and the first hanging piece is located between the second hanging piece and a top end of the first standing pole, 
 wherein the third hanging piece and the fourth hanging piece of the projection screen hanging assembly are slidably installed on the second standing pole in the direction in which the second standing pole extends, and the third hanging piece is located between the fourth hanging piece and a top end of the second standing pole, 
 wherein a guide groove, extending in the direction in which the first standing pole extends, is arranged on the first standing pole, and a guide groove, extending in the direction in which the second standing pole extends, is arranged on the second standing pole, 
 wherein the first hanging piece, the second hanging piece, the third hanging piece, and the fourth hanging piece of the projection screen hanging assembly each comprises a slider, and a connection piece removably installed on the slider, 
 wherein in the first hanging piece and the second hanging piece, the connection piece is installed on the slider, then the slider is locked on the first standing pole when the connection piece is installed on the slider, and 
 wherein in the third hanging piece and the fourth hanging piece, the slider is slidably engaged with the guide groove of the second standing pole, and the slider is locked on the second standing pole when the connection piece is installed on the slider. 
 
     
     
       10. The projection screen supporting device according to  claim 9 , wherein the connection pieces of the first hanging piece and the third hanging piece are hanging wheels formed on circumferential faces thereof with annular hanging grooves, wherein axes of the annular hanging grooves coincide with axes of the hanging wheels, wherein the annular hanging grooves are configured to hang hitching sections, arranged on the backside of the projection screen corresponding to the first hanging piece and the third hanging piece, and wherein the connection pieces of the second hanging piece and the fourth hanging piece are configured to be electrically connected with hitching sections, arranged on the backside of the projection screen corresponding to the second hanging piece and the fourth hanging piece. 
     
     
       11. The projection screen supporting device according to  claim 9 , wherein elastic pieces are arranged on the sliders and frictionally engaged with groove walls of the guide grooves to overcome the gravities of the sliders. 
     
     
       12. The projection screen supporting device according to  claim 9 , further comprising a first traversing pole and a second traversing pole opposite to each other, both of which are connected with the first standing pole and the second standing pole. 
     
     
       13. The projection screen supporting device according to  claim 12 , further comprising a third traversing pole between the first traversing pole and the second traversing pole, the third traversing pole having one end connected with the first standing pole, and another end connected with the second standing pole. 
     
     
       14. The projection screen supporting device according to  claim 13 , wherein said one end of the third traversing pole is slidably installed on the first standing pole in the direction in which the first standing pole extends, and said other end of the third traversing pole is slidably installed on the second standing pole in the direction in which the second standing pole extends. 
     
     
       15. The projection screen supporting device according to  claim 13 , wherein at least one end of the third traversing pole is arranged with an elongated pole extending beyond a gap between the first standing pole and the second standing pole to hang a peripheral device of the projection screen. 
     
     
       16. The projection screen supporting device according to  claim 12 , wherein the supporting assembly comprises a first supporting pole and a second supporting pole, both of which are substantially parallel to each other, wherein the first supporting pole is fixed on a bottom end of the first standing pole, and substantially perpendicular to the first standing pole and the second traversing pole, wherein the second supporting pole is fixed on a bottom end of the second standing pole, wherein triangular fixing pieces are arranged between the first supporting pole and the first standing pole, and between the first supporting pole and the second traversing pole, and wherein triangular fixing pieces are arranged between the second supporting pole and the second standing pole, and between the second supporting pole and the second traversing pole. 
     
     
       17. A projection system comprising a projection screen, a projection device and a projection screen supporting device, the projection screen installed on the projection screen supporting device,
 wherein the projection screen supporting device comprises a first standing pole and a second standing pole, both of which are arranged substantially parallel to each other, 
 wherein the projection screen supporting device comprises a first hanging piece, a second hanging piece, a third hanging piece and a fourth hanging piece, wherein a guide groove, extending in the direction in which the first standing pole extends, is arranged on the first standing pole, and a guide groove, extending in the direction in which the second standing pole extends, is arranged on the second standing pole, 
 wherein the first hanging piece, the second hanging piece, the third hanging piece, and the fourth hanging piece of the projection screen supporting device each comprises a slider and a connection piece removably installed on the slider, 
 wherein in the first hanging piece and the second hanging piece, the slider is slidably engaged with the guide groove of the first standing pole, and the slider is locked on the first standing pole when the connection piece is installed on the slider, 
 and wherein in the third hanging piece and the fourth hanging piece, the slider is slidably engaged with the guide groove of the second standing pole, and the slider is locked on the second standing pole when the connection piece is installed on the slider. 
 
     
     
       18. The projection system according to  claim 17 , wherein the connection pieces of the first hanging piece and the third hanging piece are hanging wheels formed on circumferential faces thereof with annular hanging grooves, wherein axes of the annular hanging grooves coincide with axes of the hanging wheels, wherein the annular hanging grooves are configured to hang hitching members, arranged on the backside of the projection screen corresponding to the first hanging piece and the third hanging piece, and wherein the connection pieces of the second hanging piece and the fourth hanging piece are configured to be electrically connected with hitching sections, arranged on the backside of the projection screen corresponding to the second hanging piece and the fourth hanging piece. 
     
     
       19. The projection system according to  claim 17 , wherein elastic pieces are arranged on the sliders and frictionally engaged with groove walls of the guide grooves to overcome the gravities of the sliders. 
     
     
       20. The projection system according to  claim 17 , further comprising a first traversing pole and a second traversing pole opposite to each other, both of which are connected with the first standing pole and the second standing pole.